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01-16-2008, 08:55 AM
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#1 |
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Registered User
Join Date: Nov 2007
Location: Bay Area, Ca
Posts: 2,841
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Auto Gear Calculator
Not sure if anyone here will use this. But I stumbled a site that showed all the different gear ratios for the several transmisions. I threw it in an excel sheet and wrote some equations. Basically if you put in your Gear, Tire, Converter loss and RPM it will give you mph for both a locked and unlocked converter. Might be helpful to figure out what you need.
http://73-ls1.com/misc/gearing_revision_2.xls If you have a tranny you would like me to add, post the gear specs and I'll add it. Added RPM vs MPH in 100 rpm increments. Put your info in the first page labeled "Top Speed" Last edited by Super73; 01-17-2008 at 10:35 PM. |
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01-16-2008, 08:56 AM
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#2 |
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Hay Team!!
 
Join Date: Jun 2003
Location: Ft. Worth, TX, USA
Posts: 366
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Re: Auto Gear Calculator
Sweet!
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1972 Chevrolet Cheyenne LWB "Orange and White" 8) |
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01-16-2008, 09:15 AM
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#3 |
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Registered User
Join Date: Nov 2007
Location: Bay Area, Ca
Posts: 2,841
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Re: Auto Gear Calculator
Did you give it a try? Did it work?
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01-16-2008, 09:28 AM
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#4 |
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Hay Team!!
Join Date: Jun 2003
Location: Ft. Worth, TX, USA
Posts: 366
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Re: Auto Gear Calculator
Yea...I did. Seems to be pretty close if not right on it.
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1972 Chevrolet Cheyenne LWB "Orange and White" 8) |
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10-25-2009, 02:06 AM
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#5 |
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Registered User
Join Date: Nov 2007
Location: Bay Area, Ca
Posts: 2,841
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Re: Auto Gear Calculator
Thought this might be a good stcky for people trying to figure out gear ratios and converter slip..
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------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49 |
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02-27-2010, 11:33 PM
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#6 |
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Registered User
Join Date: Jan 2009
Location: Jacksonville FL
Posts: 47
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Re: Auto Gear Calculator
Good stuff. shows me shift points more clearly.
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02-28-2010, 02:56 AM
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#7 |
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Registered User
Join Date: Apr 2007
Location: salina, kansas
Posts: 123
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Re: Auto Gear Calculator
hey super i need a richmond 5 speed added. what info do you need? just the first 1st through 5th ratios?
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1968 swb RIP 408. 388 roller monster mouse, richmond 5 speed. and alot of the stuff that makes you happy. build link. http://67-72chevytrucks.com/vboard/s...d.php?t=389826
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02-28-2010, 03:40 AM
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#8 |
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Registered User
Join Date: Nov 2007
Location: Bay Area, Ca
Posts: 2,841
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Re: Auto Gear Calculator
1st through 5th ratios..
__________________
------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49 |
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03-14-2010, 03:03 PM
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#9 |
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Registered User
Join Date: Apr 2007
Location: salina, kansas
Posts: 123
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Re: Auto Gear Calculator
1st 3.28
2nd 2.13 3rd 1.57 4th 1.24 5th 1.00 sorry it took so long, put this on the back burner been so busy. i appreciate it though.
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1968 swb RIP 408. 388 roller monster mouse, richmond 5 speed. and alot of the stuff that makes you happy. build link. http://67-72chevytrucks.com/vboard/s...d.php?t=389826
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10-26-2010, 11:27 PM
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#10 |
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Registered User
Join Date: Oct 2010
Location: putian
Posts: 3
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Re: Auto Gear Calculator
A gearing mechanism of a motor vehicle engine that reduces the power output required to maintain driving speed in a specific range by lowering the gear ratio
Last edited by olay198912; 10-26-2010 at 11:28 PM. |
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11-26-2010, 01:39 AM
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#11 | |
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Registered User
Join Date: Nov 2007
Location: Bay Area, Ca
Posts: 2,841
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Re: Auto Gear Calculator
Quote:
This is the third time I have read this on 3 different dates. Still trying to figure out what you are exactly looking for..
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------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49 |
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08-09-2011, 05:15 AM
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#12 |
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Registered User
Join Date: Aug 2010
Location: Lost Wages, NV
Posts: 201
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Re: Auto Gear Calculator
Here's another link that you may or may not want to use.
http://www.grimmjeeper.com/gears.html Enjoy! |
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02-02-2014, 11:44 PM
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#13 |
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Registered User
Join Date: Feb 2014
Location: Fenton, missouri
Posts: 131
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Re: Auto Gear Calculator
Hey super 73 this is a little off topic and im brand new to the website and it seems like you really know your stuff, i have a 69 shortbed with an 11-1 built 383 built 700r4 with hardened output shaft all the goodies lockup 3600 converter 3.42 rear gears and a 30 inch tall tire,truck weighs 3600 lbs i am wanting to switch to a 4.11 or 4.30 gear and didnt know if it would be too much gear for going through the traps in 3rd gear without shifting in to overdrive? any help would be great
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04-01-2014, 08:34 AM
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#14 |
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Registered User
Join Date: Aug 2010
Location: Keller TX
Posts: 836
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Re: Auto Gear Calculator
You do not want to be in OD unless you have really have that trans built to go there.. Very few are set to handle big power in OD. Plus the drop to
Drop to a 28 in tall tire. Cheaper to test that set up for RPM. what is max RPM on the engine? A few links with gear calc programs . A 30 inch tall tire in bias or radial?? Tire growth will come into play with a bais tire if that is what you have now, my dealings has been that tire is growing at least 1-1.5 inchs on the big end Try this one.. http://hotrodworks.net/hotrodmath/quarter.html http://www.locost7.info/gearcalc.php
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62 long box with a little SBC  http://www.67-72chevytrucks.com/vboa...d.php?t=510631 http://good-times.webshots.com/album/561798652HdwqzG |
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